Changeable letter sign



March 16, 1943.

B. H. ADgER GHANGEABLE LETTER SIGN 5 Sheets-Sheet 1 Fild June 15. 1940lMmh 16, 1943.- B. H. ADLER 2,313,723

' GHANGEABLE LETTER SIGN l Filed June 13,4 1940. 5 sheets-sheet 2 WM M`CHANGEABLE LETTER SIGN Filed June,` 15, 1940 5- sheets-sheet s 5Sheets-Sheet 4 March-16, 1943. B.- H. ADLER Y cmnGEMaLE LETTER s IGNFiled June 13, 1940 I l||||||1|l| m 4/0 u sisma isis/f.. I 4 W W March16, 1943.`

B. H. ADLER CHANGEABLE LETTER SIGN ined June 13. nimo` i ashun-sheet 5 MM M Patented Mar. 16, 1943 UNITED STATES PATENT oEEIoEN CHANGEABLELETTER SIGN Benjamin H. Adler,` Chicago, lll'. Application June 13,1,1940, Serial No. 340,330 14 claims. (c1. 4o14o The present inventionrelates to changeable signs and removable letters therefor. It isparticularly directed `to that type of display sign wherein a pluralityof panels are larrangedfin line to provide a large display area uponwhich letters; figures or designs are'mounted `and displayed. Thedisplay area usually is composed of frames and panels or sheets ofsuitable material associated with the frames. rIhe sheet material usedmay be of an opaque or translucent type. Where translucent material isused, it is generally for -the purpose of permitting illumination of thedisplay area from a source behind the panels.

Such signs are referred to as silhouette type because the letters oriigures that are mounted in theilluminated area appear insilhouetteinfront of the panels.

Silhouette signs of this general character usually comprise a so-calledsign box, one side or several sides thereof being open to permit themounting of the display area. The open side or sides of this sign boxmay be provided with means to removably receive the framework of thedisplay area. This means may be in the form of channels,` or rails, orany other suitable means cooperating with the frames. Arranged-withinthe sign box is a pluralityof light sources, such aselectric lamps orfluorescent tubes, adaptable to uniformly illuminate the translucentpanels of the display area. Disposed in front of the display area aremeans upon which are mounted the various character means, such asletters, iigures and designs, which are arranged to convey the desiredmessage to the public.

Signs of `this general character iind their greatest use on marquees infront of theatres,

hotels, or other establishments wherein the featur'je attractionsperiodically change. Consequently, the primary object of workers `inthis art is to provide an attractive attention-compelling sign on whichthe message easily may be changed, and whichcan be maintained andserviced with a minimum amount of labor. The present invention isdirected towards signs of this general character.

Certain features relating to my various details in silhouette signconstruction and disclosed in connection with the present invention aresubject matter of my co-pending applications, Serial No. 263,704, filedMarch 23, 1939, for Signs, and

Serial No. 308,413, iiled December 9, 1939, for,

Signs. Certain modiiications are herein made in some of my priordisclosed features in order to accommodate the present invention.

One object of the present invention' is toprovide an improved panelmounting means whereby an individual panel or sheet may be swungoutwardly to provide easy access to the interior of the sign box orilluminating compartment. Many repairs, such as replacement of` a burnedout lamp, are of a relatively simple nature and should require only afew moments of la workmans time. Consequently, such repairs should bemade possible without the necessity of completely removing a panel from.the sign box.A As more complex repairs and periodic cleaning aresometimes necessary, it is, of course; desirable to be able readily toremove the panels from thesign` box. Therefore, I have provided aI'novel hinge construction which permits the panels, in addition tobeing swung outwardly, to be 'removed individually from the displayarea.

rI 'lfie present invention contemplates a/novel panel mounting wherebythe panels are securely retained in position in the framework, butwhichnevertheless permits the `individual panel easily to be swung outwardly,or to' be completely removed `from the framework, or both. t

In one form of my invention, IV provide in conjunction with my novelpanel mounting` means and integral therewith, means for mounting'myimproved letter units on the face ofthe display area. As will beunderstood, the silhouette sign requires the display area to be as freeas possible from any irregularities which tend to detract' from acontinuously illuminated background.' Certain practical considerationsmake it desirable to provide a display area made up of a plurality ofrelatively small vremovablevpanels 'with the result that the panelmounting means do interrupt the continuity of the background to acertain extent. By combining the means for mounting the letter unitswith such panel mounting means, I have tended to minimize suchobjectionable features.

VIn view of the many advantages in providing hinged and removable panelmounting means, I include in the present disclosure many modificationsparticularly showing adaptability of my invention to numerous frameworksand in connection with various letter mounting means. For example, thepresent invention is particularly adapted to use in connection with mylocked-inline frames such as disclosed in my above mentionedpriorapplications. The necessary modiiications in such frames are hereindisclosed in considerable detail. Otherobjects and advantages ofthepresentA invention will appear more fully as the description proceeds,reference being had to the accompanying drawings wherein preferred formsof the invention are shown. It is to be understood, however, that thedrawings and descriptions are illustrative only and are not to be takenas limiting the invention except insofar as it is limited by the claims.

In the drawings- Fig. 1 is a fragmentary View in front elevation of aportion of a silhouette sign of the multidecker type, capable of takinginterchangeably several lines of display letters, and letters ofdifferent heights and sizes;

Fig. 2 is a sectional view taken substantially on the line 2--2 of Fig.1;

Fig. 3 is a somewhat enlarged sectional view on the line 3 3 of Fig. 1;

Fig. 4 is a somewhat enlarged sectional 'View of my improv-ed panelmounting means shown in conjunction with one form of letter mountingmeans and engaging letter;

Fig. 5 is a sectional view of my panel mounting means showing a panelswung outwardly;

Fig. 6 is a perspective view of my invention embodied in a lock-in-lineframework; g

Fig. 7 is a perspective view of a portion of an adjacent frame adaptedto engage the framework of Fig. 6;

Fig. 8 is a perspective view of my removable panel adapted to engage thesupporting framework -shown in Fig. 6;

Fig. 9 -is a perspective view of a portion of` my framework showing amodified form of letter mounting means;

Fig. 10 is aview in front elevation of my flatback letter embodying thenovel features hereinbeforereferred to;

Fig. 11 is a sectional View on the line IL-I'I of Fig. 10;

Fig. 12 is a sectional view on the line `II2--I2 of Fig. 10,illustrating also a modified letter mounting means in connection with myhinged panel construction; I

Fig. 13 is a sectional view illustrating still another letter mountingmeans in connection with my invention;

Fig. 14 lis a sectional view of my new beaded letter hereinbeforereferred to;

- Fig. 15 is a sectional view of my hinged construction showing stillanother letter mounting means in connection therewith, and showing-amodified form of my new letter mounted therein;

Fig. 16 is a sectional vview showing still another letter mountingmeans;

Fig. 17 is a sectional view disclosing a concave letter mounted in amodified form of the present invention,

Fig. 18 is a sectional view of my new flat-back letter and a possiblemounting therefor;

Fig. 19 is a fragmentary sectional view showing a modification with thehinge element left off the top of the removable panel and showing adifferent form of mounting the framework to the sign box;r

Fig. 20 is a fragmentary sectional view .illustrating a different formof mounting the framework to the sign box and illustrating a modifiedletter supporting means;

Fig. 21 is a sectional view illustrating the ap- Y plication of lugsitothe top and bottom edges o f the letters for mounting the lettersinchannels;

Fig. 22 is a fragmentary sectional view Showing another way in which anend framework may be received in `the end of the sign box opening;

Fig. 23 is a fragmentary perspective view showing the letter mountingmeans illustrated in Fig. 20; and

Fig. 24 is a sectional view showing still another letter mounting means.

Referring now to the drawings, and particularly to Figs. 1 and 2, thepresent invention is shown as applied to a sign box I which may havesuitable illuminating devices such as lamp 2 mounted therein. The lamps2 are arranged in spaced relationship so as to obtain a substantiallyeven distribution of light throughout the interior of the sign box I.Sometimes fluorescent tubes are used instead of electric lamps. Sign boxI is usually constructed of sheet metal and as shown in Fig. 2 isprovided with an upper channel 3 and a lower channel 4 at the frontthereof.

' Figs. 19 and 20 illustrate among other things other means for mountingthe framework on the sign box. These mounting means are adapted toreceive the plurality of frameworks which are arranged in line to makeup the display area. These frameworks, hereinafter described in ,detail,are adaptedto support a plurality of letters, characters, or designs 5in order to convey ,the desired message to the public. In signs ofsubstantial heightA spaced tie-rods 6 connect the frameworks to the rearof the sign box in order to increase rigidity in .the structure. As willbe understood, the letters 5 are customarily made in several sizes topermit some latitude in making up an attractive display. y

My preferred framework construction is perhaps best shown in Figs. 3, 6,'l and 8. This frame structure comprises end uprights I0 ,and I I.Vertically spaced horizontall panel supporting members I2 extend betweenthe .end uprights and are attached thereto by any `convenient means,such as spot-Welding. The end uprights lil, of the particular frameworksuch as that shown in Fig. 6, `are modified channel members having theiropen faces extending rearwardly of the framework. The flanges of thesechannels have portions thereof bent, in one case to provide flanges I3which overlap the edges of the insertable glass panels. The vouterflanges of each end upright lil have a portion thereof bent upon itselfas shown at ill. As will be understood the flanges I3 cooperate with thepanels to provide a light-tight joint. AThe end upright members I I ofadjacent frameworks are also channel members and are provided withsimilar panel overlapping fianges I3. A portion of the outer anges ofthese panels is bentv outwardly as shown at I5 to provide a channeladapted to receive the flange I4 of an adjacent framework. Thisconstruction is substantially similar t0 that disclosed in my copendingapplication Serial No.. 263,704 referred to above. As will beunderstood, portions of adpacent end uprights overlap to secure theframes in line and prevent the passage of light. As will be understood,the framework `shown in Fig. 6 can be removed from the sign box, Withoutdisturbing any of the other frameworks.

t The spaced horizontal panel supporting members I2 may be attached tothe end .uprights at intervals corresponding to the spacing. of theletter mounting means on the back of the letters. Figs. 4 and 5 arecross sectional views of the members I2. Said members I2 comprise 'anupwardly facing .channel I8 and a downwardly fac.- ing channel i9. Frontflange 2B of the downwardly facing channel has a portionthereof Vbentinwardly upon itself to provide an elongateclhook structure 2| tocooperate with panel members as hereinafter described.

A plurality of individual panels 25 are adapted to3be mounted on theabove described framework. 4These panels usually comprise sheets oftranslucent material. Channels 26 enclose the edges of the sheets andprovide increased rigidity in the panel. 'Ihe channel disposedalong theupper edge of the sheet is provided with an upwardly extending flange 21which is longitudinally bent to form a supporting hook as designated by28. As will be understood from Figs. 4 and the hooks 2| and 28 cooperateto pivotally support the panel 25. Small lugs 28 project from the lowercorners of the panel to provide gripping means whereby the panel may beswung outwardly.

In order to mount the individual panels in the supporting framework, itVis necessary firstly to engage the cooperating hook portions and,secondly, to seat the lower edge of the panelzin the upwardly facingchannel I8.

Conversely, a panel may be swung outwardly by utilizing the lugs 29manually to raise the panel out of the channel I8. Thus free, the panelmay be swung outwardly to provide access to the interior of the signbox. To remove the panel completely from the framework, it is necessaryonlyto disengage the cooperating hook members.

It is often desirable to provide non-removable panels at the top andbottom of the frame. In

this case, as shown in Fig. 6, the upper panel wouldbe held in place bysmall channels 38 attached to the upper end of the end uprights. Thebottom ends of the end uprights may be connected with an upwardly facingchannel 3| in which is seated the bottommost panel.

Having thus described `my improved supporting framework and associatedpanels, whichito-l gether make up the display area of my silhouettesign, I now pass to a consideration of my letter units and means formounting such units on the face of the sign.

In one form of my invention, my letter mounting means comprise channelmembers vand 36, shown clearly in Fig. 4, which may be integral with theabove described horizontal panel supporting members. Such a combinationis advantageous in that it tends to minimize objectionable interruptionsin the face of the display area. The channels 35 and 36 of adjacentunits cooperate to receive and retain letter units provided withrearwardly extending lugs as hereinafter described. Holes 31 in channels35 .and 36 prevent accumulation of water which would freeze andinterfere with ready removal of the sign letters. In the modificationshown in j Fig. 9 I use a horizontal bar 38 extending across the frontof the framework. The ends of the `bar 38 are bent to form bracket 39 bymeans of which the unit is mounted on the frame uprights. `I'he bar 38should extend across the framework immediately in front ofthe horizontalmembers I2 in order not to interfere with panels. Y h

In the modification shown in Figs. 15 and 17 the letter mounting meanscomprises an inclined channel 4| disposed between the channels I8 andI8. This is a very satisfactory mounting means because it eliminates anyprojects from the display area. Referring to Figs. 10', 11 and 12, thereis illustrated a form of letter or character whichV is particularlyadvantageous when used in connection with silhouette signs of thisgeneral character. As illustrated, the body of the letter may be made ofrelatively thin material, and is provided removal of the at itsperiphery with bevels 46 and 41 which give the letter an appearance ofsubstantial depth Vwhen mounted on an illuminated background. Thesilhouette effect is materially enhanced by finishing the body portion45 in a color contrasting withthat of the bevel 46 or 41. As will beunderstood, the recessed letter surface is protected from marring orscratching. The beveled edges lend increased strength to the letter,making it less liable to warpor bend. Means for mounting the letter onthe sign structure extend rearwardly from the back of the letter. Asshown in connection with this letter my mounting means preferably takesthe form of angular lugs 48v extending across the letter. The outerflange of the upper lug projects upwardly, and the outer iiange of thelower lug projects downwardly to securely engage the channels 35 and 36disposed in front of the display area (see Fig. 4). It is to beunderstood that any of the various letter mounting means may be used incombination with any of the specific letters herein disclosed. Forexample, the outer flanges of the angles 48 may extend in oppositedirections, in order that the letter may be mounted in the channelsshown in Fig. 4. Also my improved fiat'- back letter may be providedwith inclined flange 49", as disclosed in Fig. 15, to permit mounting inthe inclined channel 4|. In certain forms of my invention the lettermounting bars 38 Vare angularly disposed with respect to the plane ofthe panels. `Such a bar is shown in Figs. 12, 14 and 18.. For use withsuch a bar, the cooperating flange on the back of the letter is providedwith a'beveled edge 48A, best shown in Fig. 13, which bears fully on thebar, as shown in Fig. l2.

Fig, 14 is a sectional view ofanother form of letter. This particularconstruction has a body portion 50 and is provided at its periphery withrearwardly extending flanges 5|. At the junction of the flanges 5| withthe body portion 58 is bead 52. This bead 52has the effect of clearlydefining the outline of the letter regardless of the angle from whichthe letter is viewed. Means 53 for mounting the letter on the displayarea project from the rear of the letter and within its outline and maytake any ofthe various forms discussed above. v Fig. 16 discloses aperipherally flanged letter, in rthe flanges of which are inclined slots55. 'Ihese slots are adapted to receive the letter mounting bars 38whereby the letter is supported in spaced relation to the panels. 'I'heslot 55 may be slightly tapered, thereby gripping. the bars securely tooppose sidewise slipping of the letters.

In the forms of my invention wherein a letter supporting rod is disposedin front of the panels, the rod supporting brackets at the end of therod are usuallyattached to the end uprights of the framework. y

In Fig. 19 I illustrate amodied form of means for mounting my removableframework in the sign box. Instead of utilizing channels at the top andbottom of the opening in the sign box, I provide anges 68 and 6|. Inthis case horizontal channel members are provided at the top and bottomof the framework and are adapted to removably engage said anges. It willbe noted in Fig. 19 that the panels 25 are not adapted to swingoutwardly. 'I'he construction does, however, `permit removal of thepanels 25 from the framework.

Another form h of my invention is shownin Fig. 20.

In Vthis form'th frameworks are adapted to be fixed to the sign box moreor less permanently. The frame uprights Iand -I Ihave the back portionthereof cut away for a short distance from the ends `of the uprights.The reduced portion of the uprights closely fits the opening in the signbox. The end portionsI `(i of the uprights-overlap the marginal face ofthe sign box and maybe secured thereto by means 65. This constructionmay be desirable in view of the fact that the removable frameworkfeature may be considered unnecessary in addition to removable panels.'Ihe ends of luprights l0 and Il need not, however, be cut away, and theframework may be fastened in the sign box opening by any suitable means.In this modification the hinge construction is present `to permit thepanels to be swung outwardly.

The modified rletter supporting means illustrated in Fig. 20 is shown indetail in Fig. 23. This letter supporting means comprises a strip ofmaterial disposed between channels 35 and 36 of the horizontal panelsupporting member I2 and throughout the length thereof. The strip '[0projects somewhat in front of the display area and such projectingportion is provided with spaced slits. The spaced slits divide theprojecting portion into a series of lugs. Alternate lugs have their-free ends bent upwardly as shown at 'H and thefree ends oftheintermediate lugs are bent downwardly as shown at 12. As will beunderstood this construction is substantially equivalent to the channelsshown in other forms of-my invention and are adapted to receive the sameletters. It presents some advantages thereover, particularly in economyof manufacture. The disclosure of Fig. 24 utilizes the strip 10 disposedbetween channels 35 and 36. Here, however, projecting portion 'i4 isbent upwardly at an angle with the display area and is adapted toreceive letter unitsfas shown. Suitable drainage means, such as holes orslots, may be provided in the strip.

In the modification shown in Fig. 21 the iiat back letter is provided atthe top and bottom with marginal lugs 15, which lugs are adapted toengage the channel letter mounting means.v The letter may of course bemounted on thefletter Ymounting means shown in Fig. 23.

Iny the modification shown in Fig. 22 another method of mounting theside of an end framework in the sign box is shown. In this case the fweb and the front flange of letter supporting channels 35 and 36 areterminated shortfof the end uprights ID. The end uprights l!! and theback flange of the channels attached thereto are overlapped by themarginal edge of the sign box I, thereby providing a light tight jointat their junction.

From the above description, it will be apparent that I have providedcertain improvements in silhouette sign construction. I have provided adisplay area `made up of a plurality of supporting frameworks, eachframework being adapted to pivotally supporta plurality vof translucentpanels. The adjacent frame structures are adapted to overlap the edgesof one another and thereby prevent any passage of light at their joints.This overlapping feature also permits the frames to .be locked securelyin line. Incombination with the framework I have disclosed various meansfor mountingthe removable letter unitsin front of the display area. V.

It is, of course, necessary -to removethe letter units from a particularpanel before suchpanel may be swung outwardly. To facilitate suchremoval, the letter mounting means on one frameto be appreciated thatmany combinations involving the present disclosures are possible.Therefore, it is not my idea that the present invention shall be limitedby the few illustrations I have chosen to show. Any combinationspossible from the specific features disclosed herein are contemplated inthe present invention.

From the foregoing illustrative description itv is believed that theconstruction and advantages of the present invention will be readilyapparent to those skilled in this art. Having thus described myinvention, what I claim as new and desire to secure by Letters Patentis:

1. In a changeable display sign, a combination including a frameworkcomprising uprights and spaced horizontal members attached to saiduprights, a plurality of translucent panels removably supported by saidframework, said horizontal members being channels having substantiallyyan H-shaped cross-section, the upwardly facing channel thereof lbeingadapted to receive the lower edge of a panel, the downwardly facingchannel having a flange extending interiorly thereof, and flanges on theupper` edges of said panels whereby to cooperate with said first namedflanges to pivotally support said panels.

2. In a changeable display sign, a combination including a frameworkhaving spaced horizontal panel supports, said supports comprising. anupwardlyfacing, channel adapted to receive `the lower edge of a panel,and a' downwardly facing channel, said latter -channel having one of itsflanges bent inwardly at an angle, and translucent panels adapted to becarried by said supports,

Ysaid panels having flanges on the upper edges thereof whereby tocooperate with said bent flangesto pivotally support said panels.

3. In a changeable .display sign, a display area comprising a pluralityof adjacent frames and translucent panels mounted therein, said framesincluding uprightshaving interlocking means adapted yto overlap thejunction line ofsaid frames and lock the frames in line, spacedhorizontal members attached to said uprights, anges on said horizontalvmembers and anges on said panels engaging said first named flangeswhereby said panels, or any of them, may be swung away from the plane ofsaid display area.

4. In a changeable display sign, a display area comprising a` pluralityof adjacent frames and translucent panels lmounted therein, said framesincluding uprights having interlocking means adapted to overlap thejunction line of said frames and lock .the framesin line, spacedhorizontal members attached to said uprights, said horizontalmemberseach comprising an upwardly facing,A channel adaptedtoreceive the loweredge of a panel, and a `downwardly facing channel, said latter channelhaving one of its flanges bentinwardlyat an ,angle,land flanges on theupper edges of said panels 4whereby to cooperate with said firstnamedfianges to pivotally.A supportsaidIk panels. i l 4 5.,![n achangeable display sign, a combination' including a framework comprisinguprights and spaced horizontal panel supports attached to said uprights,a plurality of translucent panels pivotally mounted between adjacenthorizontal supports, letters supporting means carried by said framework,and letter units adapted to removably engage said means.

`6. In a changeable display sign, a combination including a frameworkcomprising uprights and spaced horizontal panel supports attached tosaid uprights, a plurality of translucent panels pivotally mountedbetween adjacent ports, letter supporting means carried by saidframework, and letter units adapted to removably engage said means, saidletter supporting means extending across the framework adjacent saidhorizontal panel supports to permit said panels to be swung outwardly.

7. In a changeable display sign, a combination horizontal supincluding aframework comprising uprights and spaced horizontal panel supportsattached to said uprights, a plurality of translucent panels pivotallymounted between adjacent horizontal supports, letter supporting meanscarried by said framework, and letter units adapted to removably engagesaid means, said letter supporting means being channel memberssubstantially integral with said horizontal panel supports.

8. In a changeable display sign, a combination comprising a plurality ofadjacent frames, said frames including uprights having interlockingmeans adapted to overlap the junction lines of said frames and lock theframes in line, spaced horizontal panel supports attached to saiduprights, a plurality of translucent panels pivotally mounted betweenadjacent horizontal supports, letter supporting means carried by saidframes,

` and letter units adapted to removably engage said means.

9. In a changeable display sign, a combination comprising a plurality ofadjacent frames, said frames including uprights having interlockingmeans adapted to overlap the junction lines of said frames and lock theframes in line, spaced horizontal panel supports attached to saiduprights, a plurality of translucent panels pivotally mounted betweenadjacent horizontal supports, letter supporting means carried by saidframes, and letter units adapted to removably engage said means, saidletter supporting means extending across the frame adjacent saidhorizontal panel supports to outwardly.

, 10. In a changeable display sign, a combination comprising a pluralityof adjacent frames, said frames including uprights having interlockingmeans adapted to overlap the junction lines of said frames and lock theframes in line, spaced horizontal panel supports attached to saiduprights, a plurality of translucent panels pivotally mounted betweenadjacent horizontal supports, letter supporting means carried by saidframes,

permit said panels to be swung and letter units adapted to removablyengage said means, said letter supporting means being channel memberssubstantially integral with said horizontal panel supports.

11. In a changeable display sign, a panel supporting frame includinguprights, and spaced horizontal members attached thereto, said memberscomprising an upwardly facing channel and a downwardly facing channel,said latter channel having one of its flanges bent inwardly at an angle,and translucent panels adapted to be carried by said horizontal members,said panels having flanges on the upper edges thereof whereby tocooperate with said bent flanges to pivotally support said panels,inclined letter supporting recessesk between said channels of saidhorizontal members, and letter units having lugs thereon adapted to seatin said recesses.

12. In a changeable display sign, a combination including a frameworkcomprising uprights and spaced horizontal panel supports attached tosaid uprights, a plurality of translucent panels pivotally mountedbetween adjacent horizontal supports, letter supporting means carried bysaid framework, and letter units adapted to removably engage said means,said letter supporting means comprising horizontally running membersterminating at the uprights and positioned to accommodate forwardswinging of the translucent panel without interference, saidhorizontally running members being aligned end to end so that lettersthereon may be slidably passed from alongside one panel to alongsideanother to enable the first panel to swing on its pivot.

13. In a changeable display sign, a combination including a frameworkcomprising uprights and spaced horizontal members attached to saiduprights, a plurality of translucent panels supported by said framework,at least some of said panels being pivotally mounted on said frameworkwhereby said pivoted .panels may be swung away from the plane of saiddisplay area, said framework including horizontally arranged supportsfor removable letters, said letter supports being adjacent thehorizontally running junction lines of the panels.

14. In a changeable display sign, a combination including a frameworkcomprising uprights and spaced horizontal members attached to saiduprights, a plurality of translucent panels supported by said framework,letter supporting means carried by said framework, said lettersupporting means comprising spaced lugs projecting upwardly from saidhorizontal members and spaced lugs projecting downwardly from saidhorizontal members and alternating with the first-named lugs, andremovable letters having mounting means at the back thereof receivingsaid lugs.

BENJAMIN H. ADLER.

